False, hypocritical (9)
I believe the answer is:
insincere
I believe this clue is a double definition.
'false' is the first definition.
(similar in meaning)
'hypocritical' is the second definition.
(similar in meaning)
(Other definitions for insincere that I've seen before include "may be laying it on" , "Not genuine, hypocritical" , "Dishonest" , "displaying hypocrisy" , "Not expressing genuine feelings" .)